build_py.py 文件源码

def exclude_data_files(self, package, src_dir, files):
        """Filter filenames for package's data files in 'src_dir'"""
        globs = (
            self.exclude_package_data.get('', [])
            + self.exclude_package_data.get(package, [])
        )
        bad = set(
            item
            for pattern in globs
            for item in fnmatch.filter(
                files,
                os.path.join(src_dir, convert_path(pattern)),
            )
        )
        seen = collections.defaultdict(itertools.count)
        return [
            fn
            for fn in files
            if fn not in bad
            # ditch dupes
            and not next(seen[fn])
        ]